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作者：HIROYUKISUNAYAMA;YOSHIYA MATSUDA;MASAYASU KAWAHARA;

作者單位：Mechanical Engineering and Materials Science, Kumamoto University, Student, now Japan Casting and Forging Corp.

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2004-01-05

卷：24

期：3

起頁：228

止頁：0

分類號：TQ175

語種：英文

關鍵詞：

內容簡介

Clarification of the effect of the microstructure on the oxidation rate of magnesia-carbon refractories, used under reduced pressure for steelmaking in ladles, converters and decarburizing vessels, is important to improve the oxidation resistance of the refractories. Previous researchers reported that the overall oxidation process was controlled by the diffusion of oxygen through the porous decarburized layer, but little work has been done on the relationship between the oxidation rate and the microstructure of magnesia-carbon refractories. The authors have reported on the precise measurement of the oxidation rates for cubic samples using a thermo-balance3'. In this study, the relationship between the maximum grain size of magnesia and the oxidation rate of the magnesia-carbon refractory was evaluated.